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Science 21 July 2006:
Vol. 313. no. 5785, pp. 332 - 334
DOI: 10.1126/science.1128383
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Reports

Chemoselective Hydrogenation of Nitro Compounds with Supported Gold Catalysts

Avelino Corma* and Pedro Serna

The selective reduction of a nitro group when other reducible functions are present is a difficult process that often requires stoichiometric amounts of reducing agents or, if H2 is used, the addition of soluble metals. Gold nanoparticles supported on TiO2 or Fe2O3 catalyzed the chemoselective hydrogenation of functionalized nitroarenes with H2 under mild reaction conditions that avoided the accumulation of hydroxylamines and their potential exothermic decomposition. These chemoselective hydrogenation gold catalysts also provide a previously unknown route for the synthesis of the industrially relevant cyclohexanone oxime from 1-nitro-1-cyclohexene.

Instituto de Tecnología Química, Universidad Politécnica de Valencia–Consejo Superior de Investigaciones Científicas, Avenida los Naranjos, s/n, 46022 Valencia, Spain.

* To whom correspondence should be addressed. E-mail: acorma{at}itq.upv.es

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Gold-Catalyzed Synthesis of Aromatic Azo Compounds from Anilines and Nitroaromatics.
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Science. ISSN 0036-8075 (print), 1095-9203 (online)